Russian space engineers say they have boosted the orbit of the International Space Station (ISS).

Engineers at mission control near Moscow Thursday helped the station's crew fire engines on a cargo ship docked to the station. This raised the station about eight kilometers to prepare it for the arrival of a new cargo ship next month.

The station's orbit is routinely adjusted to keep it at a proper height.

Meanwhile, the U.S. space agency has announced that singer Paul McCartney will place a live wake up call to the space station's crew Sunday.

The former Beatle will sing two songs especially for the crew from a concert near Los Angeles, California.